Materials Data on Nd2NiO4 by Materials Project

Abstract

Nd2NiO4 is (La,Ba)CuO4 structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Nd3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Nd–O bond distances ranging from 2.29–2.78 Å. Ni2+ is bonded to six O2- atoms to form corner-sharing NiO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are four shorter (1.93 Å) and two longer (2.20 Å) Ni–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 6-coordinate geometry to five equivalent Nd3+ and one Ni2+ atom. In the second O2- site, O2- is bonded to four equivalent Nd3+ and two equivalent Ni2+ atoms to form a mixture of distorted face, edge, and corner-sharing ONd4Ni2 octahedra. The corner-sharing octahedral tilt angles are 0°.